All values of n for which there exist a selfcomplementary circulant graph of order n are determined.
Bibliographical noteFunding Information:
The authors thank Brian Alspach and Mark Watkins for useful discussions. This paper was written while the third author was visiting the Department of Mathematics and Statistics of McMaster University ; he would like to thank the department for its hospitality. The research of the second author was supported by NSERC of Canada Grant No. OGP0007268.